Tech Specs are here http://www.adobe.com/products/creativecloud/tech-specs.html. Check the individual Tech Specs for each product you would like to use. This link is at the bottom of the Creative Cloud Apps & Services page here https://creative.adobe.com/apps.
Depends on the software. Dreamweaver shouldn't have much of a problem but if you plan on doing video editing then Premiere and After Effects won't be able to do a whole lot. The more memory the better and Premiere wont run at all on anything other than a 64bit operating system.
Many of the programs will run but some not so much with only 2GB of ram.